Update classroom and gameplay Ux to surface practice levels as 3a, 3b,
etc.
Update next level logic to leverage practice levels based on per level
completion playtime thresholds.
Patrol buster and patrol buster A are live for testing.
Fix a few classroom Ux progress hover bubble info bugs.
Closes#3767
* Move api loading to FacebookHandler
* Use success callbacks
* Use same, properly named events
* Use same functions and property names
* Refactor related social button, out of use rendering system
* Remove the now unnecessary form split from CreateAccountModal
